Wiring
Deactivate the 24 Vac/dc power supply until all connections are made to the device
to prevent electrical shock or equipment damage. Follow proper electrostatic
discharge (ESD) handling procedures when installing the device or equipment
damage may occur.
Use 22 AWG shielded wiring for all connections and do not locate the device wires in
the same conduit with wiring used to supply inductive loads such as motors.
Connect the cable shield to ground at the controller only. Make all connections in
accordance with national and local codes.
Connector layout is shown in Figure 5. Diagram shown includes all options. If option
is not ordered, connector will not be present.
For 4-20 mA two-wire loop-powered operation, only the POWER and OUTPUT
terminals are required if a DC power supply is used. The COMMON terminal is only
used for AC power or for a voltage output signal type. If the signal type is set to
voltage, or a 24 volt AC power supply is used, connect the positive dc voltage or the
hot side of the ac voltage to the terminal marked POWER and the power supply
common is connected to the terminal marked COMMON. The device is reverse
voltage protected and will not operate if connected backwards.
LED
FAN
Figure 10
Figure 11
Digital Output
5 Vdc
Figure 12
EXTERNAL JACK
Handheld Output
For three-wire voltage output operation, connect either an AC or DC power supply to
POWER and COMMON and the voltage output signal is available on the OUTPUT
terminal with respect to COMMON as shown in Figure 6.
Ensure the controller Analog Input (AI) matches the transmitter output signal type
before power is applied and that the pcb switches are set correctly for the required
signal type. The current signal has a maximum load that it will drive and the voltage
signal has a minimum load rating. Follow the ratings in the Specification section or
inaccurate readings may result.
This device has a half-wave power supply so the power supply common is the same
as the signal common. Several devices may be connected to one power supply and
the output signals all share the same common. Use caution when grounding the
secondary of a transformer or when wiring multiple devices to ensure the ground
point is the same on all devices and the controller.
The following optional features are only included if ordered. Wiring terminals are
only present for features ordered.
An optional resistive temperature sensor may also be included in the device and is
connected to the TEMP terminals as shown in Figure 7.
An optional resistive slide-pot setpoint output signal is available on the
and SETPNT – terminals and can be configured with various resistance values and
the operation can be set for forward or reverse acting as shown in Figure 8.
An optional override switch output is a dry-contact and is available on the
and SWITCH – terminals and typically connects to a low voltage digital input of the
controller to indicate room occupancy or override when the button is activated as
shown in Figure 9.
An optional LED input is typically powered by a 5 Vdc digital output from the
controller and connects to the LED + and LED - terminals as shown in Figure 10.
An optional five position fan speed output signal is configured with five different
resistive values and is available on the FAN + and FAN – terminals as shown in
Figure 11.
An optional external jack is internally connected to a four-pin terminal block labeled
1, 2, 3 and 4 and accepts a four-pin header connector for remote communication
with the controller as shown in Figure 12.
Start-up
Verify that the transmitter is properly wired, connections are tight and the
mA / Vdc switch is in the correct position as shown in Figure 13. For voltage output,
also ensure the 5V / 10V switch is set correctly for the required signal type as shown
in
Figure 14. Apply power and note that the LCD will begin displaying the RH level (if
installed). The output signal will also be available immediately after start-up.
Output Signal
The RH output is scaled such that 4-20 mA (or 0-5 or 0-10 Vdc) equals 0-100 %RH and
is temperature compensated over the full 0-50 °C temperature range.
Figure 13
Figure 14
0-5 Vdc
5V
10V
5V
10V
0-10 Vdc
119 mm
4.7“
29 mm
1.15 “
82.6 mm
3.25 “
58 mm
2.3 “
84 mm
3.3“
Dimensions
Greystone Energy Systems, Inc. 150 English Drive, Moncton, NB E1E 4G7 Canada Tel: +1-506-853-3057 Tollfree (North America): +1-800-561-5611 Fax: +1-506-853-6014
Email: [email protected] Web: www.greystoneenergy.com
